Antifreeze device



K Oct. 414, 1930.

A. B. woon ANTIFREEZE DEVICE Filed March 7, 1929 ATTOR EY Patented` Oct. i14, 1930 uiten. STATES rari-:lar oFFlcE ALFRED'B. WOOD, OF CHICAGO, ILLINOIS, ASSIGNOR, BY DIRECT AND MESNE ASSIGN- MENTS, TO ANTI-FREEZERCOMPANY, OF CHICAGO, ILLINOIS, A CORPORATION" OF ILLINOIS ANTUREEZE DEVICE l This invention relates to iiuid pressure systems, and more particularly to a device for preventing the freezing of moisture in the fluid of a iluid pressure system, being in the nature of an improvement on the device disclosed in my prior Patent No. 1,836,984, issued April 18, 1920.

One object of my invention is to provide means for regulating the rate of evaporation 19 of the anti-freeze liquid from the outside of the device.

Another feature of my invention is to provide means for cleaning the wick which conveys the anti-freeze liquid from the outside of the device.

Other objects and advantages will appear in the Jfollowing more detailed description of the invention.

In the accompanying drawing; Figure 1 is 29 a central sectional View of an anti-freeze device embodying my invention; and Fig. 2 a fragmentary sectional View of an anti-freeze device embodying a slightly modified form of my invention. n

As shown in Fig. 1 of the drawing, the antifreeze device may comprise acasing 1 having a chamber 2 adapted to contain a quantity of alcohol or other anti-freeze liquid, the liquid `being introduced by removing a screw plug 3. Above the chamber 2, is provided a chamber 4t which is connected at its opposite sides to a pipe 5, through which flows fluid under pressure of a luid pressure system, such as the brake system of a train.

Extending from the bottom of the chamber 2 and through the chamber 4v, is a tubular wick 6, which is mounted on a guide tube 7, and in the present construction said tube is exteriorly threaded at its upper end for yscrew-threaded engagement with a screw plug 8 which is screwed into the upper wall of the casing 1.

. A section 9 of tubing, preferably of brass, r has a sliding fit on the wick 6, and for shifta ing the tubular section, a U-shaped member 10 of wire or rodding is secured at its opposite ends'to the upper end of the section.

The legs of the U-shaped member extend n through the corresponding openings 11 in 'the plug 8, so that the vertical position of 1929. Serial No. 345,165.

the tube section 9 may be adjusted from'the outside of the device by moving the member 10 up or down. y The anti-freeze liquid in the chamber 2 is carried up the wick by capillary attraction and is exposed to the flow of liuid through pipe 5 and chamber 4:, so that the liquid evaporates from the wick and is carried along with the current of fluid.

By shifting the tubular section 9, the ex tent or areal of wick surface'exposed to the current of fluid may be' varied, as will be evident, or may even be entirely cut off, and consequently the rate of evaporation may be easily adjusted as may be desired, or the evaporation of anti-freeze liquid may be entirely cut off.

It has been found that in time, dirt is liable to collect on the outside face of the cured to an end Wall 13 of the tube 9 and may extend through a central opening in the upper end wall of the screw plug, a .finger portion 14 being bent at the upper end of th rod to provide means for operating the ro W'ith the construction shown in Fig. 2, the guide tube 7 may be screw-threaded at its lower end, instead of the upper end, for threaded engagement in the base wall of the casing 1.

While two illustrative embodiments of the invention have been described in detail, it is not my intention to limit its scope to these embodiments or otherwise than by the terms of the appended claims.

Having now described my invention. what I claim. as new und desire to secure by Letters Patent, is e? n.2 Y 1,778,13e

l. An anti-freeze device comprising a casing having a chamber containing an antireeze'lioluid7 a Wick supplied With liquid `from said chamber and exposed to a currentV of fluid, an element slidably mounted on said Wick for varying the area ofthe wick exposed to the current of fluid, and an operating menr ber securedv to said element and extending' outside of said casing.

yQfAL-n anti-freeze device comprising a `caslng,V a tubular Wick moun ed in said` casingl land having an area exposed to a currento'f fluid, a tubular section slidably mounted on said Wick and movable to vary the area of the Wick exposed, and a member secured to said section and extending outside of said casing for operating said section; v

3. A n anti-freeze device comprising a cas-A ing, a tubular Wick mountedin saidfcasing and having an area exposed to a current of fluid,-a tubular section slidably mounted on said'vvick and movable to lvary the area of the Wick exposed, a screw plug engaging said casing. and a rod secured to said section and extending` out of the'casinn` through an opening in said plug.

A In testimony whereof-l have hereunto set my hand, this 5th dav of March, 1929. ALFRED B. WOOD; 

